Suboptimality of Parity for Distilling Correlations with Nontrivial Marginals

Syed Affan Aslam, Areej Ilyas, Jibran Rashid

We prove that the PARITY protocol is optimal for a general class of non-adaptive distillation protocols of all $n$ player nonlocal boxes (NLBs) based on XOR games. The conditional…